Derestricting a 2006 derbi gpr 50

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Derestricting a 2006 derbi gpr 50

Post by ccoleman831 on Sun Aug 02, 2009 3:07 pm

Can someone tell me where all the restrictors are as mine is stuck at 30mph? also i know it needs re-jetted
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Re: Derestricting a 2006 derbi gpr 50

Post by DanHam on Sun Aug 02, 2009 3:22 pm

exhaust, whip the washer out with a hammer and chisel

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Re: Derestricting a 2006 derbi gpr 50

Post by ccoleman831 on Sun Aug 02, 2009 3:23 pm

Are there any more because ive head theres others but not too sure cuz its a new model?
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Re: Derestricting a 2006 derbi gpr 50

Post by DanHam on Sun Aug 02, 2009 3:35 pm

im not sure, start with ripping that one out, or check in the pipe when you take it apart and that

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Re: Derestricting a 2006 derbi gpr 50

Post by ccoleman831 on Sun Aug 02, 2009 3:36 pm

Will do. It's just behind the end can right?
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Re: Derestricting a 2006 derbi gpr 50

Post by DanHam on Sun Aug 02, 2009 3:42 pm

its in the end of the end can nearest the chamber I think, I aint 100% on this, anyway you wont miss it, its like a huge washer just tac welded in place

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Re: Derestricting a 2006 derbi gpr 50

Post by ccoleman831 on Sun Aug 02, 2009 3:43 pm

Ok thanks for that
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Re: Derestricting a 2006 derbi gpr 50

Post by DanHam on Sun Aug 02, 2009 3:44 pm

No Problem Smile

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Re: Derestricting a 2006 derbi gpr 50

Post by bourney on Wed Sep 09, 2009 10:29 am

like dan said the restriction washer at the end of the expansion chamber needs knocking out, don't forget to re-jet!

There MIGHT also be so wire meshing inside a section of the expansion chamber, you need to grind this section out, fuck the wire meshing off and weld it back together.
As i said im not sure if they put that in the newshape.

Otherwise there are no other restrictions. The only restriction on these bikes is on the outlet (exhaust). The CDI is not restricted, jetting isn't a restriction and the airbox isn't restrictive either.
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Re: Derestricting a 2006 derbi gpr 50

Post by New_shape_rs50 on Tue Oct 06, 2009 2:31 pm

i think theres one in the airbox to mate
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